Log Message:
Updated package to latest release, 2.5.2. Package upstream has moved
to github. Changes include:
- BatIO: make the ?cleanup parameter of BatIO.input_channel true by default:
  closing the returned input will close the underlying input channel
  #109, #489
  (Simon Cruanes, report by Michael Ekstrand)
- BatArray: add split : 'a BatOrd.ord -> 'a array -> 'a -> int * int
  search for the range equal to a given element in a sorted array
  #443, #470
  (Simon Cruanes, Gabriel Scherer, request by Fran?ois Berenger)
- BatEnum: BatEnum.combine is now curried, just like List.combine,
  its signature changes from:
    val combine: 'a t * 'b t -> ('a * 'b) t
  to
    val combine: 'a t -> 'b t -> ('a * 'b) t
  #578
  (Fran?ois Berenger)
- PSet: add a ?cmp argument to every function that creates a PSet:
    of_enum, of_list, of_array
  are changed. The default value is Pervasives.compare.
  #679
(Cedric Cellier)